_data/rules.yml: Added missing jobs rules.

_data/rules.yml

@@ -295,18 +295,38 @@ services:
   - name: Kubernetes
     exporters:
       - rules:
+          - name: KubeAPIServerDown
+            description: "Kubernetes API has disappeared from Prometheus target discovery."
+            query: 'absent(up{job="kubernetes-apiservers"}) == 1'
+            severity: critical
           - name: KubeClientErrors
-            description: "Kubernetes API server client '{{ $labels.job }}/{{ $labels.instance }}' is experiencing {{ printf \"%0.0f\" $value }}% errors.'"
+            description: "Kubernetes API server client '{{ $labels.job }}/{{ $labels.instance }}' is experiencing {{ printf "%0.0f" $value }}% errors.'"
             query: '(sum(rate(rest_client_requests_total{job=~"kubernetes-.*",code=~"5.."}[5m])) by (instance, job) / sum(rate(rest_client_requests_total[5m])) by (instance, job)) * 100 > 1'
             severity: warning
+          - name: KubeControllerManagerDown
+            description: "Kubernetes controller manager has disappeared from Prometheus target discovery."
+            query: 'absent(up{k8s-app="kubernetes-controller-manager"}) == 1'
+            severity: critical
           - name: KubeNodeNotReady
             description: "{{ $labels.node }} has been unready for more than an hour."
             query: 'kube_node_status_condition{condition="Ready",status="true"} == 0'
             severity: warning
+          - name: KubeSchedulerDown
+            description: "Kubernetes scheduler has disappeared from Prometheus target discovery."
+            query: 'absent(up{k8s-app="kubernetes-scheduler"}) == 1'
+            severity: critical
+          - name: KubeStateMetricsDown
+            description: "Kubernetes state metrics has disappeared from Prometheus target discovery."
+            query: 'absent(up{component="kube-state-metrics"}) == 1'
+            severity: critical
           - name: KubeVersionMismatch
             description: "There are {{ $value }} different semantic versions of Kubernetes components running."
             query: 'count(count by (gitVersion) (label_replace(kubernetes_build_info{job!="coredns"},"gitVersion","$1","gitVersion","(v[0-9]*.[0-9]*.[0-9]*).*"))) > 1'
             severity: warning
+          - name: KubeletDown
+            description: "Kubelet has disappeared from Prometheus target discovery."
+            query: 'absent(up{job="kubernetes-nodes"} == 1)'
+            severity: warning
           - name: KubeletTooManyPods
             description: "Kubelet {{ $labels.instance }} is running {{ $value }} pods, close to the limit of 110."
             query: 'kubelet_running_pod_count{job="kubernetes-nodes"} > (110 * 0.9)'